feat: extend HASH coverage of OSes

[philclifford]

The following OS definitions do not currently obtain an authoritative hash to permit verification of downloaded images. It would be good to find and implement authoritative hashes for these if possible (and to encourage the upstream projects to make them available if they do not currently provide them).
Supported OSes without a HASH at present:

• archcraft
• blendos
• crunchbang++
• gnomeos
• holoiso
• kolibrios
• maboxlinux
• reactos